Argos have a really neat deal going on with their Nerf products at the moment. Basically, when you buy selected products, you get a unique code on the box. Enter this code on the 'Nerf Alliance' website and you are awarded tokens that you can save up and redeem for cool Nerf goodies.
Depending on the value of the product you buy, you'll get either 1, 2, 3 or 8 tokens per item. Once you have redeemed these tokens, you can save them up, or spend them on the following:
3 Tokens - 2 packs of Vortex Lumitron discs or 36 Clip System darts.
6 Tokens - Nerf Dart Tag Speedload.
Now, I know that you will have to spend a lot of money to get anything out of this offer. Don't automatically go for the big ticket items if you want to get some free stuff. I think the cheapest way to get anything out of the offer is to take advantage of Argos' other offers. They are currently offering two Maverick REV-6s for £15. Buy 10 of them, pay £75 and get a free Lumitron. Not the best way of doing it. Lets face it, you're going to buy new Nerf stuff anyway, why not get it from Argos and get some free stuff aswell?